GB943568A - Improvements relating to the field control of dynamo-electric machines - Google Patents
Improvements relating to the field control of dynamo-electric machinesInfo
- Publication number
- GB943568A GB943568A GB4234161A GB4234161A GB943568A GB 943568 A GB943568 A GB 943568A GB 4234161 A GB4234161 A GB 4234161A GB 4234161 A GB4234161 A GB 4234161A GB 943568 A GB943568 A GB 943568A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rectifier
- current
- zero
- exciting
- rectifiers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
943,568. Exciting dynamo electric machines. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Oct. 31, 1962 [Nov. 27, 1961], No. 42341/61. Heading H2A. The exciting flux of an A.C. or D.C. machine is made to vary linearly through a range of positive and negative valves by using a circuit arrangement comprising two full-wave rectifiers 12, 13, supplying main field winding 11 in shunt and two series connected auxiliary field windings 16. The rectifier bridges are connected to pass opposing currents through the main field and comprise controlled rectifiers 15. In operation, one rectifier bridge 13 is kept non-conductive while the other 12 supplies the exciting current, when this is reduced nearly to zero rectifier 13 starts to conduct. When the output voltage is zero the currents supplied by the rectifiers are equal and opposite so there is no current in winding 11 and the fluxes produced by the series windings cancel to give zero flux in the machine. As more negative voltage is required, rectifier 13 supplies more current and rectifier 12 becomes progressively non-conductive to give the linear characteristic as shown in Fig. 5. The series fields 16 may comprise only a small number of turns, sufficient to limit the circulating current to a safe value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4234161A GB943568A (en) | 1961-11-27 | 1961-11-27 | Improvements relating to the field control of dynamo-electric machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4234161A GB943568A (en) | 1961-11-27 | 1961-11-27 | Improvements relating to the field control of dynamo-electric machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB943568A true GB943568A (en) | 1963-12-04 |
Family
ID=10423991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4234161A Expired GB943568A (en) | 1961-11-27 | 1961-11-27 | Improvements relating to the field control of dynamo-electric machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB943568A (en) |
-
1961
- 1961-11-27 GB GB4234161A patent/GB943568A/en not_active Expired
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